TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 FUEL INJECTION PUMP TIMING CHECK 0036 00 THIS WORK PACKAGE COVERS: Introduction, Removal, Timing Check, Timing Adjust, and Installation INITIAL SETUP: Tools: Breaker bar, 3/4-inch (used with 2DR engine turning tool) Engine (flywheel) turning tool for 2CA/2DA: splined wrench (item 136, WP 0176) General mechanic’s tool kit (item 121, WP 0176) Fabricated Items: Engine (flywheel) turning tool, 2DR only (item 4, WP 0177) Mandatory Replacement Parts: Gasket (2) (item 329, WP 0175) Personnel Required: Track Vehicle Repairer (2) 63H10 Equipment Conditions: Engine removed from vehicle and placed on a flat stationary surface INTRODUCTION The engine crankshaft and camshafts must be properly oriented before checking the fuel injection pump timing. It is possible for the external timing marks on the fuel injection pump and on the engine flywheel to align and still have the fuel injection pump be 180 degrees out of phase. The fuel injection pump has external timing marks (A) as well as an internal gear tooth marking (B). The fuel injection pump drive coupling rotates two times to each revolution of the internal gear tooth that is part of the timing process. In addition, the crankshaft rotates two times to each revolution of the camshafts. Strict attention to the procedure must be observed. Flywheels between Models 2DA and 2DR are different and are not interchangeable. Timing markings are identical. However, on Model 2DA, a timing pointer is affixed to the transmission housing, while on Model 2DR there are scribed markings on the transmission housing. Methods for turning the crankshaft between models require different turning tools (see WP 0034, Intake and Exhaust Valve Clearance Adjustment). For instructional purposes, a 2DR Model is described and illustrated. Timing is identical for all 2-series engines. WP 0036 00-1 A B